Calculation for C massecuite dropping purity | Online Calculator
Here two types of examples given for C massecuite dropping purity calculation. One is for grain and massecuite prepared in batch pan and example another is grain prepared in batch pan and massecuite prepared in continuous vacuum pan(CVP). Online calculation sheet also provided.
Example No.1 :
Grain prepared in 60T batch pan after that 50% material cut to vacuum crystalizer then further filled and dropped as a C m/c.
Calculate C massecuite dropping purity ( Take C grain with AH + BH + CL in 60T batch pan, After it is cutting 50% to vacuum crystalizer then further use only BH molasses upto dropping the massecuite).
Step 1 :
First fixed the required footing material purity for grain ( Before adding the slurry) suppose to be take 64
Here using AH + CL using as graining material ( AH purity – 70 with 75 brix and CL purity 62 with 75 brix)
Pan Capacity = 60MT.
Graining Volume of given batch pan = 45%.
Pan working volume = 60/1.5 = 40M3 = 400HL.
Graining Volume = 40 x 45 / 100 = 18M3 = 180HL. ( here consider graining volume of batch pan 45%)
Weight of the graining material = Volume x specific gravity = 18 x 1.42 = 25.56MT.
Solids in graining material = 25.56 x Brix(92) /100 = 23.51MT.
|10||(8 + 2)|
Solids from AH for C grain = (2 /10) x 23.51 = 4.70MT.
Solids from CL for grain material = 23.31 – 4.70 = 18.81MT.
|Material||Solids||Purity||Brix||Weight in MT ( Solids x 100/Brix)||Volume in M3 ( Weight/ Sp. Volume)||Volume in HL|
Step 2 :
After handing the the grain further fill up with BH molasses ( Brix 75 & purity 51 ).
Solids in C grain at the time of dropping = 60MT x 92 /100 = 55.20MT.
Solids from BH molasses for further filling of C grain =55.20 – 23.51 = 31.69MT
Weight of the BH molasses = 31.69 x100/ 75 = 42.25MT
Volume of the BH molasses = 42.25 /1.36 = 31.06 M3 = 310HL.
Final C Grain Purity = [ (Solids in grain x Pty of grain) + ( solids in BH x Pty of BH) ] / solids in final Cgrain.
= [ (23.51 x 64) + (31.69 x 51)] / 55.20
Step 3 :
Now 50% material transfer to vacuum crytsallizer and then filled with BH molasses ( Brix 75 & purity 51 ) and dropped as a C massecuite. Consider C m/c dropping brix 99.5.
Solids in C grain after 50% transfer to vacuum crystalizer = 55.20/2 = 27.60.
Solids in C massecuite = 60MT x 99.5 /100 = 59.7.
Solids in BH for C massecuite boiling = 59.70 – 27.60 = 32.10.
Weight of the BH molasses for C m/c = 32.10 x100/ 75 = 42.80MT
Volume of the BH molasses for C m/c = 42.80 /1.36 = 31.47 M3 = 315HL.
Final C massecuite dropping purity = [ (Solids in grain x Pty of grain) + ( solids in BH x Pty of BH) ] / solids in C m/c
= [ (27.60 x 56.53) + (32.10 x 51)] / 59.7 = 53.56.
Example No.2 :
Grain prepared in 60T batch pan then it send to continuous pan with 1 : 3 Grain & molasses ratio.
Required Data for calculation of C grain purity, C masseuite final purity, quantity of grain and molasses requirement for continuous pan. Finally estimate the vapour requirement for C continuous pan for the given pan capacity.
|C grain footing ( Before slurry feed)||86||67||1.435|
|C grain batch pan capacity||60||T|
|Grain Volume of the batch pan||45||%|
|Grain & molasses ratio||1 : 3|
|C continuous pan capacity||20||T/hr|
|C massecuite Brix||100|
Step 1 :
First fixed the required footing material purity for grain ( Before adding the slurry) and then find the C grain dropping purity.
|CL||7 (72- 65)|
|63||Footing material for Grain|
|72||2 (65 – 63)|
|9 (7 + 2)|
|Grain material purity( For C grain taken CL & AH as a footing material than further fill up with BH.)|
|1||Solids in C Grain||52.8||MT||60 x 88 /100|
|2||Volume of the pan||41.8||M3||52.8 / 1.435|
|418||HL||41.8 x 10|
|3||Graing Volume||188.15||HL||418 x 45%|
|18.82||M3||188.15 / 10|
|4||Weight of the grain material||27||MT||18.82 x 1.435|
|5||Solids in grain material||23.22||MT||27 x 86 /100|
|6||Solids from AH for garin material||5.2||MT||23.22 x 2 / 9|
|7||Solids from CL for garin material||18.1||MT||23.22 – 5.2|
|8||Weight from AH for garin material||6.88||MT||5.2 x 100 / 75|
|9||Weight from CL for garin material||24.08||MT||18.1 x 100 / 75|
|10||Volume from AH for garin material||5.15||M3||6.88/1.337|
|51||HL||5.15 x 10|
|11||Volume from CL for garin material||18.01||M3||24.08 / 1.337|
|180||HL||18.01 x 10|
|12||Solids from BH to further filling of the grain material||29.58||MT||52.8 – 23.22|
|13||Weight from BH to further filling of the grain material||36.975||MT||29.58 x 80 /100|
|14||Volume from BH to further filling of the grain material||26.392||M3||36.975 / 1.401|
|264||HL||26.39 x 10|
|15||Final C grain drooping purity||59.2||[ (29.58 x 53) + (23.22 x 67)] / 52.8|
Step 2 :
|C grain and BH molasses required for C Continuous pan for given grain and molasses ratio and C massecuite final dropping Purity|
|2||BH molasses quantity||180||MT||60 x 3|
|3||C grain solids for C m/c||52.80||MT||60 x 88/ 100|
|4||BH solids for C m/c||144||MT||180 x 80 /100|
|5||C m/c Production for given C grain Qty||196.80||T||52.80+144|
|Solids||196.80||T||196.80 x 100 /100|
|6||Grain feed Qty for Cont. Pan||6.10||MT/hr||60 x 20 /196.80|
|4.25||HL/hr||6.10 / 1.435|
|7||BH Molasses feed Qty for Cont. Pan||18.29||MT/hr||6.10 x 3|
|131||HL/hr||18.29 / 1.401|
|8||C m/c Final purity||54.65||%|
Step 3 :
|Steam Flow requirement for Continuous pan|
|1||Evaporation rate in BH||20.00||%||(100-80)/100|
|2||Evaporation rate in C grain||12.00||%||(100-88)/100|
|4.39||T/hr||[(6.10 x 12%) + (18.29 x 20%)]|
|Consider 20% extra||5.27||T/hr||4.39 x 1.2|
|Steam Flow requirement for Cont. pan||5.27||T/hr|
Online calculation for C massecuite purity